Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 204 - PREVENTION OF SIGNIFICANT DETERIORATION
Subpart B - DEFINITIONS
Section 204.220 - Adverse Impact on Visibility
Universal Citation: 35 IL Admin Code ยง 204.220
Current through Register Vol. 48, No. 38, September 20, 2024
"Adverse impact on visibility" means visibility impairment that interferes with the management, protection, preservation or enjoyment of the visitor's visual experience of the Federal Class I area. This determination must be made on a case-by-case basis taking into account the geographic extent, intensity, duration, frequency and time of visibility impairment, and how these factors correlate with:
a) Times of visitor use of the Federal Class I area; and
b) Frequency and timing of natural conditions that reduce visibility.
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